<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			.list{
				background-color: orange;
				
				width: 500px;
				height: 280px;
				
				margin: 50px auto;
				padding-top: 70px;
			}
			
			input{
				display: block;
				/*将行内元素转换为块元素*/
				width: 290px;
				height: 34px;
				
				margin: 20px auto;
			}
		</style>
	</head>
	<body>
		<form class="list">
			<input type="text" value="请输入用户名" />
			<input type="text" value="请输入验证码" />
			<input type="button" value="登录" />
		</form>
	</body>
</html>
